Submit of Mac 10.6 rebaselines for fast/composting tests

Rebaseline server is not submitting them at thit time, event though it
has been asked to do so. Ran webkit-patch rebaseline-expectations, and
pulled results from the 10.6 Mac bots for submit (old skool).

TBR=wangxianzhu@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=None

Review URL: https://codereview.chromium.org/554503002

git-svn-id: svn://svn.chromium.org/blink/trunk@181524 bbb929c8-8fbe-4397-9dbb-9b2b20218538